阅读短文，根据短文内容，从题中所给的A、B、C 两个选项中，选出最佳选项。

Wang Jun is my good friend. He is ten. He has short black hair. He has big eyes and big ears. He has a small nose and a big mouth. He is quiet and friendly. He likes maths and science. He has a big schoolbag. It's blue and white. Many books, a notebook, a pencil box and some keys are in it. He often cleans the classroom with his classmates. Look, he is cleaning the teacher's desk now.